Remove hack for the older OSX.

[qnikst]

clock_gettime has been available since macOS 10.12. Current code leads to the 10x speed penalty comparing to the use of the clock_gettime call, so it's better to move to it.

Fixes #60

[CetinSert]

@qnikst - thank you!

[CetinSert]

@qnikst

I tried making a new release on hackage but got hit with

Packages using 'cabal-version: >= 1.10' must specify the 'default-language' field for each component (e.g. Haskell98 or Haskell2010). If a component uses different languages in different modules then list the other ones in the 'other-languages' field.

using this clock.cabal

name:          clock
version:       0.8.1.2
stability:     stable
synopsis:      High-resolution clock functions: monotonic, realtime, cputime.
description:   A package for convenient access to high-resolution clock and
               timer functions of different operating systems via a unified API.
               .
               POSIX code and surface API was developed by Cetin Sert in 2009.
               .
               Windows code was contributed by Eugene Kirpichov in 2010.
               .
               FreeBSD code was contributed by Finn Espen Gundersen on 2013-10-14.
               .
               OS X code was contributed by Gerolf Seitz on 2013-10-15.
               .
               Derived @Generic@, @Typeable@ and other instances for @Clock@ and @TimeSpec@ was contributed by Mathieu Boespflug on 2014-09-17.
               .
               Corrected dependency listing for @GHC < 7.6@ was contributed by Brian McKenna on 2014-09-30.
               .
               Windows code corrected by Dimitri Sabadie on 2015-02-09.
               .
               Added @timeSpecAsNanoSecs@ as observed widely-used by Chris Done on 2015-01-06, exported correctly on 2015-04-20.
               .
               Imported Control.Applicative operators correctly for Haskell Platform on Windows on 2015-04-21.
               .
               Unit tests and instance fixes by Christian Burger on 2015-06-25.
               .
               Removal of fromInteger : Integer -> TimeSpec by Cetin Sert on 2015-12-15.
               .
               New Linux-specific Clocks: MonotonicRaw, Boottime, MonotonicCoarse, RealtimeCoarse by Cetin Sert on 2015-12-15.
               .
               Reintroduction of fromInteger : Integer -> TimeSpec by Cetin Sert on 2016-04-05.
               .
               Fixes for older Linux build failures introduced by new Linux-specific clocks by Mario Longobardi on 2016-04-18.
               .
               Refreshment release in 2019-04 after numerous contributions.
               .
               Refactoring for Windows, Mac implementation consistence by Alexander Vershilov on 2021-01-16.
               .
               [Version Scheme]
               Major-@/R/@-ewrite . New-@/F/@-unctionality . @/I/@-mprovementAndBugFixes . @/P/@-ackagingOnly
               .
               * @PackagingOnly@ changes are made for quality assurance reasons.

copyright:     Copyright © Cetin Sert 2009-2016, Eugene Kirpichov 2010, Finn Espen Gundersen 2013, Gerolf Seitz 2013, Mathieu Boespflug 2014 2015, Chris Done 2015, Dimitri Sabadie 2015, Christian Burger 2015, Mario Longobardi 2016, Alexander Vershilov 2021.
license:       BSD3
license-file:  LICENSE
author:        Cetin Sert <cetin@sert.works>, Corsis Research
maintainer:    Cetin Sert <cetin@sert.works>, Corsis Research
homepage:      https://github.com/corsis/clock
bug-reports:   https://github.com/corsis/clock/issues
category:      System
build-type:    Simple
cabal-version: >= 1.10

source-repository head
    type:      git
    location:  git://github.com/corsis/clock.git

flag llvm
    description: compile via LLVM
    default    : False

library
    default-language: Haskell2010
    if impl (ghc < 7.6)
      build-depends:       base >= 4.4 && <= 5, ghc-prim
    build-depends:       base >= 2 && <= 5
    exposed-modules:     System.Clock
    extensions:          DeriveGeneric
                         DeriveDataTypeable
                         ForeignFunctionInterface
                         ScopedTypeVariables
                         ViewPatterns
    if os(windows)
      c-sources:         cbits/hs_clock_win32.c
    include-dirs:        cbits
    ghc-options:         -O3 -Wall

    if flag(llvm)
      ghc-options:       -fllvm -optlo-O3

test-suite test
    default-language: Haskell2010
    type:
      exitcode-stdio-1.0
    hs-source-dirs:
      tests
    main-is:
      test.hs
    build-depends:
        base >= 4 && < 5
      , tasty >= 0.10
      , tasty-quickcheck
      , clock

benchmark benchmarks
    default-language: Haskell2010
    type:
      exitcode-stdio-1.0
    hs-source-dirs:
      bench
    main-is:
      benchmarks.hs
    build-depends:
        base >= 4 && < 5
      , criterion
      , clock

---

1. Do you happen to know what to change to ensure I can upload a new cabal new-sdist to hackage?
2. Is hackage still the only place to upload Haskell packages to or is/are there new repostior-y/-ies I should be aware of?

[qnikst]

Hello, @cetinsert, I'll be able to make PR for cabal file this evening (in 6-8 hours) is that works for you. I expect that I may miss some change if reply here right now. And yes, currently hackage is the only repo you should care about.

[CetinSert]

@qnikst - thank you again! I will be looking forward to your cabal PR and upload right after to hackage.